Method of making a cross joint between pipes

Details Method of making a cross joint between pipes Method of making a cross joint between pipes

1991-03-26

1992-02-25

Ramsey, Kenneth J.

Metal fusion bonding

Process

With shaping

72357, 72370, 29890148, 285156, 285287, B23K 104

Patent

active

050906119

ABSTRACT:
An improved method of making a cross joint between different size pipes is provided. A punch, die and a pressing machine are prepared. The punch includes a center rest for receiving a small pipe, a curved slot and a curved surface for transforming an end of the small pipe. Under the actuation of the pressing machine, the end of the small pipe is transformed into an arcuate configuration which is identical with the inside curvature of a large pipe. Simultaneously, a curved bead is formed on the small pipe remaining circumferentially equal distances from the resultant arcuate edge of the small pipe. This distance is substantially the same as the wall thickness of the large pipe. Utilizing the arcuate edge and the curved bead, the small pipe and the large pipe are welded or brazed together, resulting in a cross joint having no protrusion into the large pipe space.

REFERENCES:
patent: 1791887 (1931-02-01), Davies et al.
patent: 1817854 (1931-08-01), Sorensen
patent: 3866457 (1975-02-01), Bagby
patent: 3971500 (1976-07-01), Kushner et al.
patent: 3998376 (1976-12-01), Haines
patent: 4269438 (1981-05-01), Ridenour

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